Page394 of 544 NT8D15E&M TrunkCard
553-3011-100 Standard14.00 January 2002
Card-LAN
The Card Lan interface supports maintenance functions. The following list of
features are provided by the Card Lan:
•Polling form the Peripheral Controller
•Enable disable of the DS30X link
•Card status reporting
•Self-test status reporting
•Card ID
•Report configuration data
•Report of the firmware version
The Card Lan communicates through a serial communication link between
the trunk card and the Peripheral Controller. The microprocessor provides the
Card Lan function for the E & M Trunk.
Electrical characteristics
The electrical characteristics of all trunk circuits are provided in Table119.
Table 1 19
Electrical characteristics (Part1 of2)
Characteristic DID Trunk CO trunk
Nominal impedance 600 or 900 ohms, (selected
by software)
600 or 900 ohms, (selected
by software)
Signaling range 2450 ohms 1700 ohms
Signaling type Loop Ground or loop start
Far-end battery -42 to -52.5 V -42 to -52.5 V
Near-end battery N/A -42.75 to -52.5 V
Minimum loop current N/A 20 mA
Ground potential difference + 10 V + 3 V